diff --git a/build/libraries_sysmenu/boot/ARM7/src/bootAPI.c b/build/libraries_sysmenu/boot/ARM7/src/bootAPI.c
index f24a67de..de6c757d 100644
--- a/build/libraries_sysmenu/boot/ARM7/src/bootAPI.c
+++ b/build/libraries_sysmenu/boot/ARM7/src/bootAPI.c
@@ -146,7 +146,6 @@ BOOL BOOT_WaitStart( void )
 			else
 			{
 				target = REBOOT_TARGET_DS_APP;
-				MCU_GoDsMode();
 				CDC_GoDsMode();
 				// DSサウンド：DSP = 8:0
 				// 32KHz